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MSGEQ7-Based DIY Audio Spectrum Analyzer: Construction

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Clive
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Re: lacking vocals?
Clive"Max"Maxfield   9/9/2015 11:41:59 AM
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@antedeluvian: ROTFL- autocomplete, typo, modegreen or Freudian slip?

My bad LOL

Even worse, when I first saw the Deja Vu album cover when I was a lad -- with all the arty-farty caligraphy, I read it as "Crosby Stills Nash & Donny" (instead of "Crosby Stills Nash & Young") ... so that's how I always think of them LOL

antedeluvian
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Re: lacking vocals?
antedeluvian   9/9/2015 11:28:03 AM
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Max

I've played "out house" by Crosby Stills & Nash

ROTFL- autocomplete, typo, modegreen or Freudian slip?

 

sunneh
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Re: lacking vocals?
sunneh   9/9/2015 10:00:25 AM
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Thanks for the quick response!

I havent scoped it yet, have bought a cheap version it should be on its way now.

do you think the timing could be the problem? i got everything set on 1000us (i figured hey it works) haha!!!

im using avr... so i think coding is a little different. my email is shangss@gmail.com thank you in advance :D

Max The Magnificent
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Re: lacking vocals?
Max The Magnificent   9/9/2015 9:43:33 AM
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@sunneh: I was wondering if you know of any problems with the msgeq7.

Hi there -- I haven't had any problems with my MSGEQ7s -- check out this blog (with embedded video) showing my BADASS Display http://ubm.io/1FxDPE2.

I'm puzzled by your vocals problem -- I've played "out house" by Crosby Stills & Nash -- which is lagely vocals -- and it works great -- have you put a 'scope' on the input signal to see what's going in?

If you email me at max@clivemaxfield.com -- I'll send you the Arduino code I'm using to drive my BADASS display -- this includes the part that reads the data from the MSGEQ7s with the correct delays in it).

sunneh
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lacking vocals?
sunneh   9/9/2015 7:52:23 AM
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Hi there, saw your post, great vu meter :D

i was wondering if you know of any problems with the msgeq7.

So far mine is working great, but the led display does not move when there are vocals.

it only goes up and down when there is instrumentals. maybe it filtered out a frequency range? i am using lm386 to amplify the signal, otherwise the voltage would be too small 

Clive
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Re: Input level for the MSGEQ7
Clive"Max"Maxfield   6/11/2015 1:31:29 PM
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@jreza: I just watched your BADASS display and I have to say it discouraged me from building my own analyzer

It was that bad?

LOL

In the Coding Competition blog there's a link to the code I'm using for the BADASS Display. You could certainly create a much smaler version of the physical beast.

I agree that I feel really lucky being able to get components so easily.

I would love to see photos and video of your creation(s) -- maybe we could create a column around them...

jreza
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Re: Input level for the MSGEQ7
jreza   6/11/2015 1:18:52 PM
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Max
Thanks for your quick response and all the info. 
I just watched your BADASS display and I have to say it discouraged me from building my own analyzer :(, I know I'll never get close to that (just kidding! Baby steps).
About the function generator and the shield, I live in Mexico, so it's kind of hard for me to try to get any of those (I barely got the MSGEQ7, I envy you and the way you get everything practically from around the corner :(  ) 
I'll take a deeper look at the posts when I get home.
When it is done I'll share some photos or video on what you've helped to build :)
Thanks a lot.
jreza

Clive
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Re: Input level for the MSGEQ7
Clive"Max"Maxfield   6/11/2015 11:33:24 AM
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@Jreza: What is the input level required by the MSGEQ7? Is it enough with just the output signal from a regular portable player? (from your tutorial it seems it does). Is it enough with the output level of a regular mic?

Hi there -- I think you're going to really enjoy playing with this chip. Take a look at This YouTube Video showing two of these chips driving my BADASS Display.

I'm using the output from the headphone jack from my iPod (sometimes my iPad) with no problems at all -- typically I set the iPad to about 3/4 full volume to drive this chip -- then I control the actual sound volume using the amplifier driving the speakers.

I started off by creating a prototype using a breadboard (see This YouTube Video), but later my chum Duane Benson took my circuit and generated a special printed circuit board (PCB) for an Arduino Shield (this uses two MSGEQ7 chips -- one for each channel).



You can buy one of these boards from Duane from his SteelPuppet.com website if you wish.

Are you using an Arduino? If so, one of the things I do when I've just built a new sound analyzer card (I've now constructed three using Duane's shield for different projects) is to use the Serial I/O to display the numerical values on the screen so I can see what's happening -- you could use this technique to see how your microphone was working.

If you want to see some example Arduino code for this, email me at max@clivemaxfield.com and I'll send it to you.

jreza
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Input level for the MSGEQ7
jreza   6/11/2015 10:14:43 AM
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Hi there.
I'm getting all the components to start this proyect. Thanks for the tutorial. 
I have a question though, What is the input level required by the MSGEQ7? Is it enough with just the output signal from a regular portable player? (from your tutorial it seems it does). Is it enough with the output level of a regular mic?
Thanks
jreza

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